Anomaly detection device, anomaly detection method, and computer program for detecting anomaly

An anomaly detection method comprising:

• identifying a path region in an image representing surroundings of a vehicle, the path region representing a host vehicle lane on which the vehicle is traveling;
• extracting a feature indicating a condition of a road surface regarding the path region from the image by inputting the path region into a feature extractor that has been trained to extract the feature;
• and
• detecting an abnormal condition in which the vehicle is unable to travel normally on the host vehicle lane, when the feature is outside a normal range that is a tolerable range in which the vehicle is able to travel normally.

A non-transitory recording medium that stores a computer program for detecting an anomaly, the computer program causing a processor mounted on a vehicle to execute a process comprising:

• identifying a path region in an image representing surroundings of the vehicle, the path region representing a host vehicle lane on which the vehicle is traveling;
• extracting a feature indicating a condition of a road surface regarding the path region from the image by inputting the path region into a feature extractor that has been trained to extract the feature;
• and
• detecting an abnormal condition in which the vehicle is unable to travel normally on the host vehicle lane, when the feature is outside a normal range that is a tolerable range in which the vehicle is able to travel normally.